Question

N' indicate is the formula anthmetic mean ×=€× by n

Answer 1

Mean (aka Arithmetic Mean, Average) - The sum of all of the numbers in a list divided by the number of items in that list. For example, the mean of the numbers 2, 3, 7 is 4 since 2+3+7 = 12 and 12 divided by 3 [there are three numbers] is 4.